2281987 has 2 divisors, whose sum is σ = 2281988. Its totient is φ = 2281986.

The previous prime is 2281973. The next prime is 2282017. The reversal of 2281987 is 7891822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2281987 - 2¹⁹ = 1757699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2281687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140993 + 1140994.

It is an arithmetic number, because the mean of its divisors is an integer number (1140994).

2^2281987 is an apocalyptic number.

2281987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281987 is an equidigital number, since it uses as much as digits as its factorization.

2281987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 2281987 is about 1510.6247052130. The cubic root of 2281987 is about 131.6551105242.

The spelling of 2281987 in words is "two million, two hundred eighty-one thousand, nine hundred eighty-seven".